/Engine/Source/Runtime/Engine/Public/Animation/ActiveMontageInstanceScope.h
Notify Context Data containing the Instance ID of the montage that triggered this notify This is useful i.e When there's simultaneous instances of the same montage, to trigger start/end events of its notify states.
class FAnimNotifyMontageInstanceContext : public [UE::Anim::IAnimNotifyEventContextDataInterface](API\Runtime\Engine\Animation\IAnimNotifyEventContextDataInter-)
const int32
MontageInstanceID